I have and liver seems fine, which was a surprise
I read where two drinks a night are fine and I drink 4 so that does not seem tremendously excessive
Two drinks a night over enough time will eventually addict you, but at that level the harm is relatively mild and comparable to things like driving a car. The problem is once addicted the amount goes up.
Forty plus drinks a week on a regular basis is suicidal. You need to outright stop drinking completely for a few months at least to detox. If your liver isn't harmed it is certainly under stress with fat deposits building up. A break from alcohol for a few months will give it time to heal and clear out the crud.
I used to drink too much, but never got anywhere near forty drinks a week as a regular thing. I would go out once or twice a week and drink maybe ten drinks each night out, with maybe once every month or so some crazy late night thing where I would drink maybe fifteen. Very rarely I would do the all night after party thing and drink until 7am but not I kind of just grew out of that and settled into a weekly routine of closing the bar once a week, or getting together at someone's house with a small group of drinking friends.
So maybe I averaged fifteen to twenty drinks a week.
I eventually decided I needed to stop doing that and identified that I had a set of friends who were basically drinking friends. Would get wasted every time I went out with them, really, all we every actually did was go drinking.
So I reset. I started cutting down the time I spent with that group of friends, or if I saw them, in other non drinking contexts. Like I would invite them to the shooting range in the afternoon instead of meeting up on Fridays after work.
Moving to the US let me reset again. New city, new friends, built my new social circle around other activities besides drinking. No one here expects me to be the guy who goes drinking all night.
Now I will go out for dinner and have maybe two drinks, and only in social settings. Sometimes I go out and just eat, don't drink at all. I'm down to maybe three or four drinks in a whole week now.
Long story short, if you want to change your drinking behavior you need to make other changes, around what activities you get involved in, and with who. You can't just stop drinking, you have to change to something else.